<template>
    <div>
         <!-- 面包屑导航区域-->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图-->
    <el-card>
        <!--为Echarts准备一个具备大小（宽高）的Dom-->
        <div id="main" style="width:750px;height:400px"></div>
    </el-card>
    </div>
</template>

<script>
// 1.导入 echarts
import echarts from 'echarts'
import _ from 'lodash'
export default {
    data(){
        return {
            //需要合并的数据
            options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
        }
    },
    created(){},
    //此时，页面上的元素，已经被渲染完毕了！
    async mounted(){
        // 3.基于好的DOM, 初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'))

        const {data:res} = await this.$http.get('reports/type/1')
        if(res.meta.status !==200){
            return this.$message.console.error('获取折线图失败！');
            
        }
        // 4.准备数据和配置项
        const result = _.merge(res.data,this.options)

        // 5.展示数据

        myChart.setOption(result)
    },
    methods:{}
}
</script>

<style lang="less" scoped>

</style>
